Across
- 2. what the solar system is made of
- 4. belt border between the inner and outer planets
- 5. red planet
- 8. hottest planet
- 9. planets are the four planets closest to the sun
- 10. most dense inner planet
Down
- 1. closets to the sun
- 3. outer layer of the planet
- 6. Earth-like
- 7. biggest planet